Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea3fcef3ceac251…

MALICIOUS

PDF

56.6 KB Created: 2020-09-02 07:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b6f8decba23ac11fb43bbe98188868e SHA-1: ff1ab20007943e670dc17c750c84fd1be3afb379 SHA-256: aea3fcef3ceac2510d7197ca47b6d5746b2e1e5bde81ab27177094131f6ff18e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/pify?keyword=deed+of+assignment+template+nigeria'. This URL is likely part of a phishing or malware distribution chain. The document body, though heavily obfuscated, also contains this URL, reinforcing its malicious intent. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/pify?keyword=deed+of+assignment+template+nigeria
    • https://static.usrfiles.com/ugd/b914b5_5fb7e178e089400680c011fb5f219a32.pdf
    • https://static.usrfiles.com/ugd/1acd69_b44d50147fb84c749cdc5e3468e12278.pdf
    • https://static.usrfiles.com/ugd/1decf9_07615f6aa1744b22b111b4a688897817.pdf
    • https://static.usrfiles.com/ugd/c1615c_305fcc1ee94a4d68a470bda32ef1900e.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4831/files/chiclete_com_banana_antigas_cd.pdf
    • https://cdn.shopify.com/s/files/1/0465/3803/1254/files/68079926635.pdf
    • https://cdn.shopify.com/s/files/1/0427/8625/9100/files/vetofaroliwovuwi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/three_kingdoms_tv_series.pdf
    • https://cdn.shopify.com/s/files/1/0439/4031/5294/files/33656769072.pdf
    • https://cdn.shopify.com/s/files/1/0428/1729/0406/files/2384014810.pdf
    • https://cdn.shopify.com/s/files/1/0432/9832/4638/files/guacamelee_super_trophy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0436/2056/5156/files/kamor.pdf
    • https://static.usrfiles.com/ugd/db93e9_c0a9c17ba76b4325aa2b4a51461541da.pdf
    • https://static.usrfiles.com/ugd/5360f8_2983de08a3aa40c4a035951fbae07e0c.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009677.bin
dd7b880f1c6958317b71933e3175eb4154b1281d355b69180e4ce829e506ee21
pdf-font-stream PDF embedded font (sfnt) at offset 0x9677 2828 bytes
font_01_sfnt_off0000a071.bin
b489843723303af7db13f92f02eb06e235dc098ec8d4219c4d7c772ff68b2e23
pdf-font-stream PDF embedded font (sfnt) at offset 0xA071 5360 bytes
font_02_sfnt_off0000b29d.bin
e50bc0b4187735ec0d7826702c84da8b6d733dd235e5ea2d5be88e2b4f325708
pdf-font-stream PDF embedded font (sfnt) at offset 0xB29D 10088 bytes